If you want to add some adjustment to your SUP Paddle, the Pro-T Adjustable handle from Kialoa is the way to do it.
The patented lever-lock system is solid – it won’t budge once you’ve set it. The 6″ version gives you a limited amount of adjustment, making it ideal for your own multi-purpose paddle. At its longest you can tour or race, at the shortest you can surf. Awesome!